Citadel Advisors LLC

SEC CIK: 0001423053
Latest filing: Sep 1, 2026

SEC filings (opens in a new tab)

WST holding history

West Pharmaceutical Services Inc in every 13F filed by Citadel Advisors LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

WST overview All 13F holders of WST Full Q2 2026 holdings

Shares (Q2 2026): 352,769
Value: $126.6M
% of portfolio: 0.1%
Quarters held: 21; Since Q2 2021

Holdings of WST by Citadel Advisors LLC, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q2 2026	352,769	$126.6M	0.1%	+29,182+9.0%	Added	Holders
Q1 2026	323,587	$81.1M	0.1%	+77,947+31.7%	Added	Holders
Q4 2025	245,640	$67.6M	<0.1%	−481,897−66.2%	Reduced	Holders
Q3 2025	727,537	$190.9M	0.2%	+598,751+464.9%	Added	Holders
Q2 2025	128,786	$28.2M	<0.1%	−151,941−54.1%	Reduced	Holders
Q1 2025	280,727	$62.8M	0.1%	−390,151−58.2%	Reduced	Holders
Q4 2024	670,878	$219.8M	0.2%	+622,752+1,294.0%	Added	Holders
Q3 2024	48,126	$14.4M	<0.1%	−232,218−82.8%	Reduced	Holders
Q2 2024	280,344	$92.3M	0.1%	−779,802−73.6%	Reduced	Holders
Q1 2024	1,060,146	$419.5M	0.4%	+131,129+14.1%	Added	Holders
Q4 2023	929,017	$327.1M	0.3%	−622,761−40.1%	Reduced	Holders
Q3 2023	1,551,778	$582.2M	0.6%	+498,447+47.3%	Added	Holders
Q2 2023	1,053,331	$402.9M	0.4%	−45,851−4.2%	Reduced	Holders
Q1 2023	1,099,182	$380.8M	0.4%	+938,098+582.4%	Added	Holders
Q4 2022	161,084	$37.9M	<0.1%	−55,815−25.7%	Reduced	Holders
Q3 2022	216,899	$53.4M	0.1%	+81,966+60.7%	Added	Holders
Q2 2022	134,933	$40.8M	0.1%	−260,198−65.9%	Reduced	Holders
Q1 2022	395,131	$162.3M	0.2%	+394,115+38,790.8%	Added	Holders
Q4 2021	1,016	$477.0K	<0.1%	−54,943−98.2%	Reduced	Holders
Q3 2021	55,959	$23.8M	<0.1%	+28,271+102.1%	Added	Holders
Q2 2021	27,688	$9.94M	<0.1%	+27,688	New	Holders